Year	Percent
1996-01-01	92.8036
1997-01-01	92.7799
1998-01-01	92.2937
1999-01-01	92.3203
2000-01-01	93.0649
2001-01-01	92.7005
2002-01-01	93.1211
2003-01-01	93.1341
2004-01-01	90.9718
2005-01-01	88.9730
2006-01-01	88.3876
2007-01-01	85.7677
2008-01-01	83.3765
2009-01-01	83.3184
2010-01-01	84.7515
2011-01-01	82.5104
2012-01-01	82.8828
2013-01-01	84.6122
2014-01-01	85.6511
2015-01-01	89.3134
2016-01-01	90.4744